Cylinder port control



March 14, 1933. 'o. H. SPENCER 1,901,193

CYLINDER PORT CONTROL 1929 2 Sheets-Sheet 1 Filed June fie. 1.

I cnizor March 14, 1933. Q SPENCER 1,901,198

CYLINDER PORT CONTROL Filed June 11, 1929 2 Sheets-Sheet 2 Patented Mar. 14, 1933 v i v UNiTEo STATES r -PATENT OFFICE I ownn n. SPENCER, on Inn-Inivnronrs; mean; 7 l i CYLINDER 1 031 ca e); 7 Application filed June 11 1eea. 'seriai no." 369,996.

This invention relates to means for introfor scavenging the cylinderfl, a chamber .5" 5 ducing air or gaseous charge into the cylinis constructedon the face of the cylinder 1 ders of an internal combustion engine, and preferably between the tappets 6 and 7, emone feature of the invention is the provision ployedlfor operating the usual form of intake of a chamber independently of the exhaust and exhaust valves associated with each cy1- and intake tappet controls and preferably 1nder. Charge for the-chamber5. is preferth b t vably conveyed thru. the crank case 8 of the A further feature of the invention is in engine in any suitable manner, any suitableso constructing the chamber that any lubriform of conduit 9 extending from said crank cant carried into the chamber with the air will case to the receiving port 10 ofthe chamber v be separated therefrom and collected in the 5. 'By'conveylng the air thru the crank case- 1 chamber. 7 c .8 to the chamber 5, such air is more or less A further feature of the invention is the impregnatedcwith lubricant 0r oilparticles,

provision of means for conveying the 001- and byplacing the receiving port 10 adjacent lected lubricant to the valve tappets and oper the upper end of the chamber 5 the major ating parts therefor and eventually'returnportlon of the llllOIlOilIlt willse'paratefroming the lubricant to the crank case of the the air and be collected in the lower portion i ofthe chamber, from whence it is conveyed c A further feature of the invention is the thru bores ll'onto the tappets 6 and 7,:from

30' provision of an air controlling valve for reguwhence it descends by gravity onto the cams lating the admission of air to the cylinders of '12 and 13 used for operatingthe tappets 6 the engine. andi', respectively, and thence descends into A further feature of the invention is the r h r nk ase 8. a i v provision of means for operating said valve The chamber 5 is provided Wi h a partition for closing the same in timed relation with 14, Wl'llCh 1S lOCELtGd'bQtWBQIlthe inlet PC1134 the valve tappets, the operating means being {and the receiving port l05said partition; havseparate from the means employed for oper- 111g evalve receiving'opening 15 therethru ating the intake and exhaust valve tappets. v f r the passage of air from'the chamber Other objects and advantages will be herepr p r totheinlet, port 4. 1

t inafter more fully set forth and pointed out Cooperating with the opening 15 is a valve in the accompanying specification. 16, which has a sliding fit with the opening In the accompanying drawings which are 15,;theWall of the opening being somewhat made a part of this application, elongated sothat the valve 16 may have some Figure 1 is a vertical transverse'sectional verti al m vem nt Wi houtTuncovering the the air chamber associated therewith. incident to the explosionstroke of the piston.

FigureQis an enlarged detail sectional view The valve 16 is attached to a .tappet 17, the of the air chamber, showing the intake and upper end of the tappet having a pintle 18 exhaust valve tappets associated therewith. 'slidably mounted in a. socket 19 at the upper t f Referring to the drawings in which similar end of the chainberti, while the lower porwhich is slidably mounted a piston 2, saidthe tappet17 and valve 16,while the valve reference numerals designate corresponding tion thereof extends thru'a guide QO'and-into parts thruout the several views, the numeral Engag ment with a'cam 21 on a shaft 22fthe' 1 designates the cylinder of an engine of the cams 12 and V13 being-preferably attached H internal combustion four-stroke cycle type in vto the same shaft- The cam 21 acts to elevate 5, cylinder having an intake valve 3 in the top and tappet are moved downwardly by means portion thereof and an air inlet port 4 and of a spring 23 between the top end of the an exhaust port 4 in the bottom portion chamber5 and the valve 16'. ,If desired, a thereof. bore 2e maybe formed lengthwise of the pin- In order to convey air to the inlet port 4 tie 18 to permit air to escape from the socket view thru an internal combustion engine and Opening 15 so that said valve will open only 19 as the pintle is forced into the same, or permit air to enter the socket to prevent vacuum therein as the pintle moves outwardly in the socket.

The guide 20 is provided with an enlarged base 25, which not only forms a support for the guide,'but forms the bottom wall of the chamber 5, the diameter of the base being such that the valve 16 may be entered or re- 10 moved thru the opening in which the base I fits. The peripheral edge of the base is provided with a flange 26, which'fits a recess 27 in the lower edge of the chamber 5 so that when the cylinder is clamped to theengine base in the usual'manner, the guide'20 will be locked in position within. the chamber 5.

' In addition to forming a closure for the lower end. of the chamber 5, the base25 forms a closure for the opening 28 in the top portion of the crank case 8, thru whichrthe tappet 17 projects. The base 25 may be provided with one or moreports 29 thru which the lubricant within thechamber 5 may descend onto the tappet 17, and thence by gravity to the cam 21 and into the crank case 8.

While the description and drawings illustratein a general way certain instrumentali- .ties which may be employed .in carrying the 1. The combination with a cylinder of an engine having valve controlled inlet and exhaust ports in its outer end, a p ston controlled exhaust adjacent its inner end, and

tappets for operating said valves, of an air.

chamber independent of said 'tappets and having an air inlet port opposite the lower, exhaust port, apartition in a valve seat in said partition, a valve adapted to slide through said seat for controlling the passage of air through the air chamber and air inlet port cooperatingtherewith,a

' tappet carrying said valve, means for operable base ating said latter tappet in timed relation with the first mentioned tappets, and means for conveying air to'said chamber.

2. The combination with the cylinder of an engine, an exhaust and an intake port adj acent the outer end thereof and an exhaust I port adjacent its inner end, and a crank case having an opening therethrough, of an air said chamber, 7

valve for controlling the admission of air to said cylinder, and a cam in said crank case for moving said valve to closed position.

In testimony whereof, I have hereunto set myhand on this the 31st day of May, 1929,

OWEN H. SPENCER.

chamber positioned over said op'ening'in the crank case, means for introducing air from V the'chamber into said cylinder at a point opposite said inner exhaust port,a removover andcover the opening in the crank case, a hollow guide on sald base, a tappet projecting throughsaidguide and opening, a'

for said chamber adaptedto rest 

